ISO 13921:2008

Aerospace — Screws, 100 degrees reduced countersunk head, internal offset cruciform ribbed or unribbed drive, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa — Dimensions

ISO 13921:2008 specifies the dimensions of 100° reduced countersunk head screws with internal offset cruciform ribbed or unribbed drive, with close or large tolerance normal shank and short or medium length MJ threads, in metallic material, coated or uncoated, with strength classes less than or equal to 1 100 MPa. ISO 13921:2008 is applicable to the compilation of aerospace product standards.

Aéronautique et espace — Vis à tête fraisée 100 degrés réduite, à empreinte cruciforme déportée, avec ou sans saillies antidérapantes, à tige normale et filetages MJ courts ou de longueur moyenne, en matériau métallique, revêtues ou non revêtues, des classes de résistance inférieures ou égales à 1 100 MPa — Dimensions

General Information

• Status: Published
• Publication Date: 17-Aug-2008
• ICS: 49.030.20 - Bolts, screws, studs
• Technical Committee: ISO/TC 20/SC 4 - Aerospace fastener systems
• Drafting Committee: ISO/TC 20/SC 4 - Aerospace fastener systems
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 08-Jun-2020

Relations

• Revises: ISO 13921:1996 - Aerospace — Screws, 100 degrees reduced countersunk head, internal offset cruciform ribbed or unribbed drive, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa — Dimensions
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 13921
Second edition
2008-08-15


Aerospace — Screws, 100 degrees
reduced countersunk head, internal offset
cruciform ribbed or unribbed drive,
normal shank, short or medium length MJ
threads, metallic material, coated or
uncoated, strength classes less than or
equal to 1 100 MPa — Dimensions
Aéronautique et espace — Vis à tête fraisée 100 degrés réduite,
à empreinte cruciforme déportée, avec ou sans saillies antidérapantes,
à tige normale et filetages MJ courts ou de longueur moyenne, en
matériau métallique, revêtues ou non revêtues, des classes de
résistance inférieures ou égales à 1 100 MPa — Dimensions




Reference number
ISO 13921:2008(E)
©
ISO 2008

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ISO 13921:2008(E)
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ii © ISO 2008 – All rights reserved

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ISO 13921:2008(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 13921 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee
SC 4, Aerospace fastener systems.
This second edition cancels and replaces the first edition (ISO 13921:1996), which has been technically
revised.

© ISO 2008 – All rights reserved iii

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INTERNATIONAL STANDARD ISO 13921:2008(E)

Aerospace — Screws, 100 degrees reduced countersunk head,
internal offset cruciform ribbed or unribbed drive, normal shank,
short or medium length MJ threads, metallic material, coated or
uncoated, strength classes less than or equal to 1 100 MPa —
Dimensions
1 Scope
This International Standard specifies the dimensions of 100° reduced countersunk head screws with internal
offset cruciform ribbed or unribbed drive,
...